"""Test the Home Assistant local auth provider."""
import asyncio
from unittest.mock import Mock, patch

import pytest
import voluptuous as vol

from homeassistant import data_entry_flow
from homeassistant.auth import auth_manager_from_config, auth_store
from homeassistant.auth.providers import (
    auth_provider_from_config, homeassistant as hass_auth)

from tests.common import mock_coro


@pytest.fixture
def data(hass):
    """Create a loaded data class."""
    data = hass_auth.Data(hass)
    hass.loop.run_until_complete(data.async_load())
    return data


@pytest.fixture
def legacy_data(hass):
    """Create a loaded legacy data class."""
    data = hass_auth.Data(hass)
    hass.loop.run_until_complete(data.async_load())
    data.is_legacy = True
    return data


async def test_validating_password_invalid_user(data, hass):
    """Test validating an invalid user."""
    with pytest.raises(hass_auth.InvalidAuth):
        data.validate_login('non-existing', 'pw')


async def test_not_allow_set_id():
    """Test we are not allowed to set an ID in config."""
    hass = Mock()
    with pytest.raises(vol.Invalid):
        await auth_provider_from_config(hass, None, {
            'type': 'homeassistant',
            'id': 'invalid',
        })


async def test_new_users_populate_values(hass, data):
    """Test that we populate data for new users."""
    data.add_auth('hello', 'test-pass')
    await data.async_save()

    manager = await auth_manager_from_config(hass, [{
        'type': 'homeassistant'
    }], [])
    provider = manager.auth_providers[0]
    credentials = await provider.async_get_or_create_credentials({
        'username': 'hello'
    })
    user = await manager.async_get_or_create_user(credentials)
    assert user.name == 'hello'
    assert user.is_active


async def test_changing_password_raises_invalid_user(data, hass):
    """Test that changing password raises invalid user."""
    with pytest.raises(hass_auth.InvalidUser):
        data.change_password('non-existing', 'pw')


# Modern mode

async def test_adding_user(data, hass):
    """Test adding a user."""
    data.add_auth('test-user', 'test-pass')
    data.validate_login(' test-user ', 'test-pass')


async def test_adding_user_duplicate_username(data, hass):
    """Test adding a user with duplicate username."""
    data.add_auth('test-user', 'test-pass')
    with pytest.raises(hass_auth.InvalidUser):
        data.add_auth('TEST-user ', 'other-pass')


async def test_validating_password_invalid_password(data, hass):
    """Test validating an invalid password."""
    data.add_auth('test-user', 'test-pass')

    with pytest.raises(hass_auth.InvalidAuth):
        data.validate_login(' test-user ', 'invalid-pass')

    with pytest.raises(hass_auth.InvalidAuth):
        data.validate_login('test-user', 'test-pass ')

    with pytest.raises(hass_auth.InvalidAuth):
        data.validate_login('test-user', 'Test-pass')


async def test_changing_password(data, hass):
    """Test adding a user."""
    data.add_auth('test-user', 'test-pass')
    data.change_password('TEST-USER ', 'new-pass')

    with pytest.raises(hass_auth.InvalidAuth):
        data.validate_login('test-user', 'test-pass')

    data.validate_login('test-UsEr', 'new-pass')


async def test_login_flow_validates(data, hass):
    """Test login flow."""
    data.add_auth('test-user', 'test-pass')
    await data.async_save()

    provider = hass_auth.HassAuthProvider(hass, auth_store.AuthStore(hass),
                                          {'type': 'homeassistant'})
    flow = await provider.async_login_flow({})
    result = await flow.async_step_init()
    assert result['type'] == data_entry_flow.RESULT_TYPE_FORM

    result = await flow.async_step_init({
        'username': 'incorrect-user',
        'password': 'test-pass',
    })
    assert result['type'] == data_entry_flow.RESULT_TYPE_FORM
    assert result['errors']['base'] == 'invalid_auth'

    result = await flow.async_step_init({
        'username': 'TEST-user ',
        'password': 'incorrect-pass',
    })
    assert result['type'] == data_entry_flow.RESULT_TYPE_FORM
    assert result['errors']['base'] == 'invalid_auth'

    result = await flow.async_step_init({
        'username': 'test-USER',
        'password': 'test-pass',
    })
    assert result['type'] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
    assert result['data']['username'] == 'test-USER'


async def test_saving_loading(data, hass):
    """Test saving and loading JSON."""
    data.add_auth('test-user', 'test-pass')
    data.add_auth('second-user', 'second-pass')
    await data.async_save()

    data = hass_auth.Data(hass)
    await data.async_load()
    data.validate_login('test-user ', 'test-pass')
    data.validate_login('second-user ', 'second-pass')


async def test_get_or_create_credentials(hass, data):
    """Test that we can get or create credentials."""
    manager = await auth_manager_from_config(hass, [{
        'type': 'homeassistant'
    }], [])
    provider = manager.auth_providers[0]
    provider.data = data
    credentials1 = await provider.async_get_or_create_credentials({
        'username': 'hello'
    })
    with patch.object(provider, 'async_credentials',
                      return_value=mock_coro([credentials1])):
        credentials2 = await provider.async_get_or_create_credentials({
            'username': 'hello '
        })
    assert credentials1 is credentials2


# Legacy mode

async def test_legacy_adding_user(legacy_data, hass):
    """Test in legacy mode adding a user."""
    legacy_data.add_auth('test-user', 'test-pass')
    legacy_data.validate_login('test-user', 'test-pass')


async def test_legacy_adding_user_duplicate_username(legacy_data, hass):
    """Test in legacy mode adding a user with duplicate username."""
    legacy_data.add_auth('test-user', 'test-pass')
    with pytest.raises(hass_auth.InvalidUser):
        legacy_data.add_auth('test-user', 'other-pass')
    # Not considered duplicate
    legacy_data.add_auth('test-user ', 'test-pass')
    legacy_data.add_auth('Test-user', 'test-pass')


async def test_legacy_validating_password_invalid_password(legacy_data, hass):
    """Test in legacy mode validating an invalid password."""
    legacy_data.add_auth('test-user', 'test-pass')

    with pytest.raises(hass_auth.InvalidAuth):
        legacy_data.validate_login('test-user', 'invalid-pass')


async def test_legacy_changing_password(legacy_data, hass):
    """Test in legacy mode adding a user."""
    user = 'test-user'
    legacy_data.add_auth(user, 'test-pass')
    legacy_data.change_password(user, 'new-pass')

    with pytest.raises(hass_auth.InvalidAuth):
        legacy_data.validate_login(user, 'test-pass')

    legacy_data.validate_login(user, 'new-pass')


async def test_legacy_changing_password_raises_invalid_user(legacy_data, hass):
    """Test in legacy mode that we initialize an empty config."""
    with pytest.raises(hass_auth.InvalidUser):
        legacy_data.change_password('non-existing', 'pw')


async def test_legacy_login_flow_validates(legacy_data, hass):
    """Test in legacy mode login flow."""
    legacy_data.add_auth('test-user', 'test-pass')
    await legacy_data.async_save()

    provider = hass_auth.HassAuthProvider(hass, auth_store.AuthStore(hass),
                                          {'type': 'homeassistant'})
    flow = await provider.async_login_flow({})
    result = await flow.async_step_init()
    assert result['type'] == data_entry_flow.RESULT_TYPE_FORM

    result = await flow.async_step_init({
        'username': 'incorrect-user',
        'password': 'test-pass',
    })
    assert result['type'] == data_entry_flow.RESULT_TYPE_FORM
    assert result['errors']['base'] == 'invalid_auth'

    result = await flow.async_step_init({
        'username': 'test-user',
        'password': 'incorrect-pass',
    })
    assert result['type'] == data_entry_flow.RESULT_TYPE_FORM
    assert result['errors']['base'] == 'invalid_auth'

    result = await flow.async_step_init({
        'username': 'test-user',
        'password': 'test-pass',
    })
    assert result['type'] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
    assert result['data']['username'] == 'test-user'


async def test_legacy_saving_loading(legacy_data, hass):
    """Test in legacy mode saving and loading JSON."""
    legacy_data.add_auth('test-user', 'test-pass')
    legacy_data.add_auth('second-user', 'second-pass')
    await legacy_data.async_save()

    legacy_data = hass_auth.Data(hass)
    await legacy_data.async_load()
    legacy_data.is_legacy = True
    legacy_data.validate_login('test-user', 'test-pass')
    legacy_data.validate_login('second-user', 'second-pass')

    with pytest.raises(hass_auth.InvalidAuth):
        legacy_data.validate_login('test-user ', 'test-pass')


async def test_legacy_get_or_create_credentials(hass, legacy_data):
    """Test in legacy mode that we can get or create credentials."""
    manager = await auth_manager_from_config(hass, [{
        'type': 'homeassistant'
    }], [])
    provider = manager.auth_providers[0]
    provider.data = legacy_data
    credentials1 = await provider.async_get_or_create_credentials({
        'username': 'hello'
    })

    with patch.object(provider, 'async_credentials',
                      return_value=mock_coro([credentials1])):
        credentials2 = await provider.async_get_or_create_credentials({
            'username': 'hello'
        })
    assert credentials1 is credentials2

    with patch.object(provider, 'async_credentials',
                      return_value=mock_coro([credentials1])):
        credentials3 = await provider.async_get_or_create_credentials({
            'username': 'hello '
        })
    assert credentials1 is not credentials3


async def test_race_condition_in_data_loading(hass):
    """Test race condition in the hass_auth.Data loading.

    Ref issue: https://github.com/home-assistant/home-assistant/issues/21569
    """
    counter = 0

    async def mock_load(_):
        """Mock of homeassistant.helpers.storage.Store.async_load."""
        nonlocal counter
        counter += 1
        await asyncio.sleep(0)

    provider = hass_auth.HassAuthProvider(hass, auth_store.AuthStore(hass),
                                          {'type': 'homeassistant'})
    with patch('homeassistant.helpers.storage.Store.async_load',
               new=mock_load):
        task1 = provider.async_validate_login('user', 'pass')
        task2 = provider.async_validate_login('user', 'pass')
        results = await asyncio.gather(task1, task2, return_exceptions=True)
        assert counter == 1
        assert isinstance(results[0], hass_auth.InvalidAuth)
        # results[1] will be a TypeError if race condition occurred
        assert isinstance(results[1], hass_auth.InvalidAuth)